Tropical Storm Dorian is fighting to maintain itself as a tropical cyclone, according to the National Hurricane Service.

Dorian, the fourth named Atlantic storm of the season, formed over the far eastern Atlantic Ocean southwest of the Cape Verde Islands early Wednesday morning.

Dorian is expected to continue tracking west or west-northwest over the next several days on the south side of the Bermuda-Azores high, and will remain over open waters through the weekend.

Dorian will approach the longitude of the northern Leeward Islands, the Virgin Islands and Puerto Rico on Sunday night into Monday, and then the Dominican Republic and Haiti on Monday night into Tuesday.

Given the expected weakening, the U.S. threat appears to be virtually zero from Dorian at this time.